An experimental study of flammability limits of LPG/air mixtures☆

Mishra, D.P.; Rahman, Ashiqur

doi:10.1016/s0016-2361(02)00325-3

Cited by 50 publications

(26 citation statements)

References 6 publications

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“…It is demonstrated that LEL in this study is slightly higher compared to Mishra and Kenneth's [13] experimental data. In this study, the LEL is observed at 2% vol of LPG (by volume).…”

Section: Comparison Data With the Previous Studiescontrasting

confidence: 57%

Effect of H₂enrichment on the explosive limits of Liquefied Petroleum Gas (LPG) in conventional combustion

Izhab¹,

Shahirah²,

Zubaidah³

et al. 2011

WIT Transactions on Ecology and the Environment

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The use of hydrogenated fuels shows a considerable promise for the applications in gas turbines and internal combustion engines. Hydrogen holds a significant promise as a supplemental fuel to improve the performance and emissions of ignited spark and compression ignited engines. Hydrogen has the ability to burn at extremely lean equivalence ratios. In addition, it is important to analyze the explosive limits for safety reasons and to increase the efficiency in operation of many industrial and domestic applications that use the explosion concept. The aims of this study are to determine the explosive limits of liquefied petroleum gas/air mixture and to investigate the effect on the explosive limits of liquefied petroleum gas/air mixture enriched up to 8% vol of hydrogen at atmospheric pressure and ambient temperature. The experiments were performed in a constant volume of 20 liter closed spherical vessel. The mixtures were ignited by using a spark permanent wire that was placed at the centre of the vessel. The pressure-time variations during the explosion of liquefied petroleum gas/air mixture in explosion vessel were recorded. The explosion pressure data is used to determine the explosive limits which flame propagation is considered to occur if the explosion pressure is greater than 0.1 bar. In this study, the result shows the explosive limits range from 2 to 8% vol of liquefied petroleum gas/air mixture and has revealed that the addition of hydrogen in liquefied petroleum gas/air mixture decreases the lower explosive limit from 2 to 1% vol and for the upper explosive limit, the limit is also decrease from 8 to 7% vol.

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“…It is demonstrated that LEL in this study is slightly higher compared to Mishra and Kenneth's [13] experimental data. In this study, the LEL is observed at 2% vol of LPG (by volume).…”

Section: Comparison Data With the Previous Studiescontrasting

confidence: 57%

Effect of H₂enrichment on the explosive limits of Liquefied Petroleum Gas (LPG) in conventional combustion

Izhab¹,

Shahirah²,

Zubaidah³

et al. 2011

WIT Transactions on Ecology and the Environment

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“…The maximum temperatures of the air plasma flame at the center of the flame exit were between 980 and 1, 210 K. This is significantly higher than 550 K, reported by , but similar to 1,173-1,773 K, reported by Tang and Huang (2005) for temperatures of air/nitrogen plasma generated by microwave source. However, when 5l pm LPG was injected as a fuel into the air plasma flame, the maximum gas temperature measured by a thermocouple drastically raised to 1480 K. It should be noted that the fuel-air mixture of the LPG was only 1.63 % which was well below the lean side of its flammability limit, defined as the boundary composition of the fuel-air mixture beyond which gas is incapable of flame propagation (Mishra and Rahman, 2003). Nonetheless, an increase in gas temperature after LPG addition may be resulted from exothermic chemical reaction accomplished by high temperature and high radical density of the plasma flame, similar to that observed by Bang et al (2006).…”

Section: Plasma Torch Performancementioning

confidence: 99%

Development of a laboratory scale air plasma torch and its application to electronic waste treatment

Tippayawong

Khongkrapan

2009

Int. J. Environ. Sci. Technol.

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Expansion in electrical and electronic equipment trade has led to significant increase in electronic waste which should be dealt with special priority due to its potential negative impact to the public health and the environment. Thermal plasma technology offers a very promising alternative of hazardous waste treatment for the near future. In this study, a laboratory scale apparatus for generating high temperature plasma flame was presented. Design of a 20 kW plasma torch system was based on a non transferred direct current arc discharge with air as a medium gas. In this investigation, measurements of temperature distribution were performed. It was shown that high temperature flames can be generated, comparable to those reported in the literature. The gas temperature was found to increase with an increase in power input. The flame temperature was found to further increase from 1210 K to 1480 K when a small amount of added fuel gas. Assessment of electronic waste treatment using the air plasma system in a batch operation was also carried out. It was shown that the system was able to convert the electronic waste into combustible gas and inert solid residues. High mass loss rate of bulk electronic waste was demonstrated.

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“…The accuracy of this mechanism on the prediction of laminar burning velocity of iso-butane and n-butane combustion with air at standard conditions of pressure and temperature was demonstrated. Mishra and Rahman (2003) determined the flammability limits of air and LPG (30% of butane and 70% of propane) at ambient conditions and within 0.53−2.48 of equivalence ratio, by the use of a constant volume combustion chamber. Dagaut and Hadj Ali (2003) built a detailed mechanism that consists of 827 reactions involving the kinetic of 112 chemical species.…”

Section: Liquefied Petroleum Gas Mechanismmentioning

confidence: 99%

On the predictability of chemical kinetics for the description of the combustion of simple fuels

Orbegoso¹,

Silva²,

Novgorodcev³

2011

J. Braz. Soc. Mech. Sci. & Eng.

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An experimental study of flammability limits of LPG/air mixtures☆

Cited by 50 publications

References 6 publications

Effect of H₂enrichment on the explosive limits of Liquefied Petroleum Gas (LPG) in conventional combustion

Effect of H₂enrichment on the explosive limits of Liquefied Petroleum Gas (LPG) in conventional combustion

Development of a laboratory scale air plasma torch and its application to electronic waste treatment

On the predictability of chemical kinetics for the description of the combustion of simple fuels

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An experimental study of flammability limits of LPG/air mixtures☆

Cited by 50 publications

References 6 publications

Effect of H2enrichment on the explosive limits of Liquefied Petroleum Gas (LPG) in conventional combustion

Effect of H2enrichment on the explosive limits of Liquefied Petroleum Gas (LPG) in conventional combustion

Development of a laboratory scale air plasma torch and its application to electronic waste treatment

On the predictability of chemical kinetics for the description of the combustion of simple fuels

Contact Info

Product

Resources

About

Effect of H₂enrichment on the explosive limits of Liquefied Petroleum Gas (LPG) in conventional combustion

Effect of H₂enrichment on the explosive limits of Liquefied Petroleum Gas (LPG) in conventional combustion